From 4674ec0e4b833ab0d0365225ba99228df14abe87 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 13 Jan 2017 09:05:08 +0100 Subject: Rename to blind MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/blind-read-head.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/blind-read-head.c (limited to 'src/blind-read-head.c') diff --git a/src/blind-read-head.c b/src/blind-read-head.c new file mode 100644 index 0000000..afb2fbc --- /dev/null +++ b/src/blind-read-head.c @@ -0,0 +1,63 @@ +/* See LICENSE file for copyright and license details. */ +#include "stream.h" +#include "util.h" + +#include +#include + +USAGE("") + +int +main(int argc, char *argv[]) +{ + char buf[STREAM_HEAD_MAX]; + char magic[] = {'\0', 'u', 'i', 'v', 'f'}; + char b, *p; + size_t i, ptr; + ssize_t r; + + ENOFLAGS(argc); + + for (ptr = 0; ptr < sizeof(buf);) { + r = read(STDIN_FILENO, buf + ptr, 1); + if (r < 0) + eprintf("read :"); + if (r == 0) + goto bad_format; + if (buf[ptr++] == '\n') + break; + } + if (ptr == sizeof(buf)) + goto bad_format; + + p = buf; + for (i = 0; i < 5; i++) { + r = read(STDIN_FILENO, &b, 1); + if (r < 0) + eprintf("read :"); + if (r == 0 || b != magic[i]) + goto bad_format; + } + + for (i = 0; i < 3; i++) { + if (!isdigit(*p)) + goto bad_format; + while (isdigit(*p)) p++; + if (*p++ != ' ') + goto bad_format; + } + while (isalnum(*p) || *p == ' ') { + if (p[0] == ' ' && p[-1] == ' ') + goto bad_format; + p++; + } + if (p[-1] == ' ' || p[0] != '\n') + goto bad_format; + + ewriteall(STDOUT_FILENO, buf, ptr, ""); + + return 0; +bad_format: + eprintf(": file format not supported\n"); + return 0; +} -- cgit v1.2.3-70-g09d2